Natural gas heat treatment furnace and method

Abstract

The present invention proposes a natural gas heat treatment furnace and method, including a furnace body, an internal assembly furnace, an internal furnace, a heating component, two push racks, two push plates, two traction components, and a cold air supply pipe, wherein the internal assembly furnace is arranged inside the furnace body, and the internal furnace is slidably arranged on the inner side of the internal assembly furnace. The metal workpiece located in the internal furnace is heated by a burner to complete the heating treatment of the metal workpiece. When the metal workpiece needs to be cooled, the internal furnace is driven to move upward. When the internal furnace moves to the top, the burner is completely moved to one side of the push plate, and the cold air supply pipe is adjusted to supply cold air. At this time, the cold air is blown toward the middle of the internal furnace, thereby completing the rapid cooling treatment of the metal workpiece. When the metal workpiece is cooled by the cold air supply pipe, the push plate can isolate the heat generated by the burner, thereby reducing the temperature influence of the burner on the storage area of ​​the metal workpiece, thereby improving the cooling efficiency of the metal workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas heat treatment furnaces, and in particular to a natural gas heat treatment furnace and method. Background Art

[0002] A natural gas heat treatment furnace is a device used to heat metal workpieces and control their temperature to achieve specific heat treatment purposes. A natural gas heat treatment furnace generates a high-temperature heat source by burning natural gas to heat the metal workpiece to the required temperature. During the heat treatment process, accurate temperature control is essential, so natural gas heat treatment furnaces are usually equipped with a temperature control system that can accurately adjust the temperature of the heating area as needed to ensure that the metal workpiece reaches the predetermined heat treatment temperature.

[0003] When a natural gas heat treatment furnace is performing heat treatment on metal workpieces, it needs to go through three steps: heating, insulation and cooling. After the natural gas is burned in the combustion chamber, it is transferred to the inside of the furnace bin through the furnace pipe to heat the metal workpiece. Once the metal workpiece reaches the target temperature, the temperature control system in the heating chamber will monitor and adjust the temperature of the heating area to keep the metal workpiece within a certain temperature range for a certain period of time to complete the insulation process. After the heat treatment is completed, the metal workpiece needs to be further cooled according to the requirements of the heat treatment process.

[0004] When cooling a metal workpiece, the cooling process of the metal workpiece is usually achieved by shutting down the combustion system and gradually reducing the temperature in the heating chamber. However, after shutting down the combustion system, a large amount of heat is still contained in the furnace tube, and the temperature in the furnace chamber decreases slowly, which results in low cooling efficiency of the metal workpiece. At the same time, the metal workpiece can also be taken out and placed in a cooling medium for rapid cooling. However, this results in taking out the workpiece and external cooling taking too much time. Therefore, a natural gas heat treatment furnace and method are proposed to solve the above problems. Summary of the invention

[0005] In view of this, the present invention proposes a natural gas heat treatment furnace and method, which heats the metal workpiece located in the inner furnace through a burner to complete the heating treatment of the metal workpiece. When the metal workpiece needs to be cooled, the inner furnace is driven to move upward. When the inner furnace moves to the top, the burner is completely moved to one side of the push plate, and the cold air supply pipe is adjusted to supply cold air. At this time, the cold air is blown toward the middle of the inner furnace, thereby completing the rapid cooling treatment of the metal workpiece. When cooling the metal workpiece through the cold air supply pipe, the push plate can isolate the heat generated by the burner, thereby reducing the temperature impact of the burner on the metal workpiece storage area, thereby improving the cooling efficiency of the metal workpiece.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a natural gas heat treatment furnace, including a furnace body, an inner assembly furnace, an inner furnace, a heating component, two push racks, two push plates, two traction components, and a cold air supply and delivery pipe, wherein:

[0007] The inner assembly furnace is arranged inside the furnace body, and the inner furnace is slidably arranged inside the inner assembly furnace, and the inner furnace is used to store metal workpieces;

[0008] The heating component includes two inner furnace tubes and a plurality of burners, the two inner furnace tubes are respectively located at opposite sides of the inner cavity of the inner furnace and are fixedly arranged relative to the inner furnace, the plurality of burners are respectively connected to the two inner furnace tubes, and the burners are used to heat the metal workpiece;

[0009] The push frame is an inclined frame, and the two push frames are respectively located on opposite sides of the inner cavity of the inner furnace and are respectively fixedly connected to the two inner furnace tubes;

[0010] Two push plates are slidably arranged on the inner side of the inner furnace, the push plates are sealed and fitted with the cavity wall of the inner furnace, the two push plates are opposite to the two push racks in the height direction, the metal workpiece is stored between the two push plates, when the inner furnace slides upward, the push rack contacts the push plates and pushes the push plates to slide in the direction close to the middle of the inner furnace, when the inner furnace slides to the top, the burner and the metal workpiece are respectively located on opposite sides of the push plates;

[0011] The traction component includes a side box and a spring, the two side boxes are respectively arranged on opposite sides of the inner furnace, and the spring is arranged between the side box and the push plate to reset the sliding position of the push plate;

[0012] The top of the inner furnace is open, and the cold air supply pipe is connected with the top of the inner furnace and is used for supplying cold air to the middle part of the inner cavity of the inner furnace.

[0013] On the basis of the above technical solution, preferably, the built-in assembly furnace comprises a bottom furnace box, an upper furnace box and a furnace cover, wherein:

[0014] The upper furnace box is arranged on the top of the bottom furnace box and is connected with the bottom furnace box. The furnace cover is covered on the top of the upper furnace box. The inner furnace and the upper furnace box are both square furnace boxes. The top of the inner furnace is embedded in the inner side of the upper furnace box, and the outer surface of the inner furnace is sealed and fitted with the cavity wall of the upper furnace box.

[0015] On the basis of the above technical solution, preferably, it includes a combustion chamber, and the heating component also includes a connecting furnace pipe, wherein,

[0016] The combustion chamber is arranged at the bottom of the bottom furnace box and is used to burn natural gas to generate heat;

[0017] The connecting furnace pipe is connected to the combustion chamber and the inner furnace pipe. The inner furnace pipe is inclined and located inside the inner furnace. A connecting hole for the connecting furnace pipe to pass through is provided on the inner furnace. The push frame protrudes the burner in the extension direction of the burner.

[0018] On the basis of the above technical solution, preferably, it further comprises two matching parts, wherein:

[0019] Two matching parts are both arranged at the top of the inner cavity of the inner furnace and are respectively located above the two push frames. The matching parts include a sealing part and an embedded part. The sealing part is sealed and fitted with the cavity wall of the inner furnace, and the embedded part is arranged at the bottom of the sealing part. When the inner furnace slides upward to the top, the embedded part is inserted into the inner side of the inner furnace and sealed and fitted with the inner furnace. An embedded groove is provided at the bottom of the inner furnace, and the push plate is inserted into the inner side of the embedded groove and sealed and fitted with the embedded groove. A vent is provided at the bottom of the inner furnace.

[0020] On the basis of the above technical solution, preferably, the traction component further includes a sleeve, a sliding member and a connecting rod, wherein:

[0021] A sleeve, arranged inside the side box;

[0022] A sliding member, slidably disposed on the inner side of the sleeve;

[0023] A connecting rod is fixedly connected to the sliding member, and the end of the connecting rod passes through and extends to the interior of the inner furnace. The connecting rod is fixedly connected to the push plate, and the spring is sleeved on the circumference of the connecting rod and fixedly connected to the sliding member and the sleeve.

[0024] On the basis of the above technical solution, preferably, it includes a driving gear, wherein:

[0025] The driving gear is rotatably connected with the inner furnace, and a sliding tooth groove is provided on the upper furnace box. The driving gear is located at the inner side of the sliding tooth groove and meshes with the sliding tooth groove.

[0026] On the basis of the above technical solution, preferably, it further comprises a first sealing plate and a second sealing plate, wherein:

[0027] The opposite side walls of the inner cavity of the upper furnace box are provided with receiving grooves, the first sealing plate and the second sealing plate are respectively rotatably arranged on the inner sides of the two receiving grooves, and are both sealed and fitted with the cavity walls of the upper furnace box, the first sealing plate and the second sealing plate are both located at the top of the inner furnace, a supporting groove for the second sealing plate to be plugged in is provided on the top of the first sealing plate, and the first sealing plate and the second sealing plate can both be rotatably arranged to be located on the inner sides of the receiving grooves.

[0028] On the basis of the above technical solution, preferably, it also includes a furnace door, a supporting block and a material introduction door, wherein:

[0029] A first furnace opening is provided on one side of the furnace body, and a second furnace opening is provided on a side of the built-in furnace corresponding to the first furnace opening, and the furnace door is rotatably arranged on one side of the furnace body to cover the first furnace opening;

[0030] A supporting block is arranged inside the first furnace opening and the second furnace opening, and the top wall of the supporting block is an inclined wall;

[0031] A material introducing door is rotatably arranged on one side of the inner furnace to cover the inner furnace, and the bottom of the material introducing door is rotatably connected to the inner furnace. When the material introducing door rotates, the supporting block is supported on the bottom of the material introducing door, and the end of the material introducing door protrudes from the first furnace opening.

[0032] On the basis of the above technical solution, preferably, it further includes a lock buckle and a buckle plate, wherein:

[0033] A lock, arranged between the material introducing door and the inner furnace, for locating the rotation position of the material introducing door;

[0034] A buckle groove is provided on the outer side of the material introducing door, and the buckle plate is arranged inside the buckle groove, and a buckle seam is formed between the buckle plate and the buckle groove.

[0035] The present invention also proposes a natural gas heat treatment method, comprising the natural gas heat treatment furnace described above, and further comprising the following steps:

[0036] S1. Open the furnace door and the charging door, adjust the charging door to rotate until it is supported on the top of the supporting block, and feed the metal workpiece to the top of the charging door. At this time, the metal workpiece falls into the inner furnace along the charging door, thereby completing the loading process of the metal workpiece;

[0037] S2, closing the furnace door and the charging door, and heating the metal workpiece in the inner furnace through the burner to complete the heating treatment of the metal workpiece;

[0038] S3, by controlling the burner temperature, to complete the heat preservation treatment of the metal workpiece;

[0039] S4, driving the inner furnace to move upward along the inner assembly furnace, at this time, the push frame contacts the push plate and pushes the push plate to slide toward the middle of the inner furnace, and the push plate pushes the metal workpiece in the inner furnace to slide toward the middle of the inner furnace. When the inner furnace moves to the top, cold air is supplied to the inner furnace through the cold air supply pipe, thereby completing the rapid cooling of the metal workpiece.

[0040] The natural gas heat treatment furnace and method of the present invention have the following beneficial effects compared with the prior art:

[0041] (1) By arranging that the metal workpiece is stored inside the inner furnace, when the metal workpiece needs to be heated, the metal workpiece located in the inner furnace is heated by the burner to complete the heating treatment of the metal workpiece. At the same time, after the heating step is completed, the heat generated by the burner is controlled to complete the heat preservation treatment of the metal workpiece. When the metal workpiece needs to be cooled, the inner furnace is driven to move upward. At this time, the push frame contacts the push plate and pushes the push plate to move toward the middle of the inner furnace. When the inner furnace moves to the top, the burner moves completely to one side of the push plate, and the cold air supply pipe is adjusted to supply cold air. At this time, the cold air is blown toward the middle of the inner furnace, thereby completing the rapid cooling treatment of the metal workpiece. When cooling the metal workpiece through the cold air supply pipe, the push plate can isolate the heat generated by the burner, thereby reducing the temperature impact of the burner on the metal workpiece storage area, thereby improving the cooling efficiency of the metal workpiece.

[0042] (2) In a specific implementation, when the inner furnace is adjusted to move to the top, the push plate can be moved to be inserted into the embedded groove. Since the matching part includes a sealing part and an embedded part, when the push plate is inserted into the embedded groove, the sealing part is sealed and connected to the inner furnace, and the embedded part is sealed and connected to the inner furnace, so that a cold air flow space can be formed between the matching part, the push plate and the inner furnace, so that the cold air can be fully blown to the top of the metal workpiece to cool the metal workpiece, and the cooled gas is blown out from the vent hole to form air flow, thereby increasing the utilization rate of the cold air and improving the cooling efficiency of the metal workpiece.

[0043] (3) In a specific implementation, when the metal workpiece is heated by the burner, the first sealing plate and the second sealing plate are sealed to each other and cover the top of the inner furnace to isolate the inner furnace from the cold air supply pipe, thereby preventing the high temperature generated by the burner from damaging the cold air supply pipe when the metal workpiece is heated by the burner, and preventing heat from escaping from the cold air supply pipe to reduce the heating efficiency of the metal workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 is a three-dimensional diagram of a natural gas heat treatment furnace of the present invention;

[0046] Figure 2 It is a three-dimensional schematic diagram of the natural gas heat treatment furnace of the present invention after the furnace body is disassembled;

[0047] Figure 3 It is a left side view of the natural gas heat treatment furnace of the present invention;

[0048] Figure 4 The natural gas heat treatment furnace of the present invention Figure 3 A partial cross-sectional view of the structure at AA is shown;

[0049] Figure 5 The natural gas heat treatment furnace of the present invention Figure 4 The enlarged schematic diagram of point B is shown;

[0050] Figure 6 The natural gas heat treatment furnace of the present invention Figure 5 The schematic diagram of the structure shown in the state after the feed gate is opened;

[0051] Figure 7 It is a left-side partial cross-sectional view of the natural gas heat treatment furnace of the present invention;

[0052] Figure 8 The natural gas heat treatment furnace of the present invention Figure 7 The enlarged schematic diagram of point C is shown;

[0053] Fig. 9 A cross-sectional view of the connection between the first sealing plate and the second sealing plate of the natural gas heat treatment furnace of the present invention;

[0054] Fig.10 The natural gas heat treatment furnace of the present invention Figure 7 A schematic diagram of the state of the structure shown in the process of driving the inner furnace to rise;

[0055] Fig.11 The natural gas heat treatment furnace of the present invention Figure 7 A schematic diagram of the state of the structure shown when driving the inner furnace to rise to the top;

[0056] Fig.12 The natural gas heat treatment furnace of the present invention Figure 2A top perspective schematic diagram of the structure shown;

[0057] Fig.13 The natural gas heat treatment furnace of the present invention Figure 2 A schematic diagram of the state of the structure shown when the upper furnace box is removed;

[0058] Fig.14 It is a three-dimensional schematic diagram of the inner furnace structure of the natural gas heat treatment furnace of the present invention;

[0059] Fig.15 It is a three-dimensional schematic diagram of the structure of the inner furnace tube of the natural gas heat treatment furnace of the present invention;

[0060] Fig.16 It is a cross-sectional view of the matching parts of the natural gas heat treatment furnace of the present invention. DETAILED DESCRIPTION

[0061] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] like Figures 1 to 16As shown, the natural gas heat treatment furnace of the present invention comprises a furnace body 1, an inner assembly furnace 2, an inner furnace 3, a heating component 5, two push racks 61, two push plates 62, two traction components 7, and a cold air supply pipe 81, wherein the inner assembly furnace 2 is arranged inside the furnace body 1, and the inner furnace 3 is slidably arranged on the inner side of the inner assembly furnace 2, and the inner furnace 3 is used to store metal workpieces; the heating component 5 comprises two inner furnace tubes 52 and a plurality of burners 53, the two inner furnace tubes 52 are respectively located on opposite sides of the inner cavity of the inner furnace 3, and are fixedly arranged relative to the inner assembly furnace 2, and the plurality of burners 53 are respectively connected to the two inner furnace tubes 52, and the burners 53 are used to heat the metal workpieces; the push rack 61 is an inclined rack, and the two push racks 61 are respectively located on opposite sides of the inner cavity of the inner furnace 3, and are respectively fixedly connected to the two inner furnace tubes 52; the two push plates 62 , are all slidably arranged on the inner side of the inner furnace 3, the push plate 62 is sealed and fitted with the cavity wall of the inner furnace 3, the two push plates 62 are relative to the two push frames 61 in the height direction, and the metal workpiece is stored between the two push plates 62. When the inner furnace 3 slides upward, the push frame 61 contacts the push plate 62 and pushes the push plate 62 to slide in the direction close to the middle of the inner furnace 3. When the inner furnace 3 slides to the top, the burner 53 and the metal workpiece are respectively located on the opposite sides of the push plate 62; the traction component 7 includes a side box 71 and a spring 72, the two side boxes 71 are respectively arranged on the opposite sides of the inner furnace 3, the spring 72 is arranged between the side box 71 and the push plate 62, and is used to reset the sliding position of the push plate 62; the top of the inner furnace 3 is open, and the cold air supply pipe 81 is connected to the top of the inner assembly furnace 2, and is used to supply cold air to the middle of the inner cavity of the inner furnace 3.

[0063] In a specific implementation, the inner furnace 3 and the inner assembly furnace 2 slide up and down, the heating component 5 is connected to the combustion chamber 4, and the burner 53 generates heat to heat the metal workpiece. The push frame 61 can be a pipe rack, and a gap is formed between the push plate 62 and the inner furnace 3 for the push frame 61 to be inserted.

[0064] In a specific implementation, the metal workpiece is stored inside the inner furnace 3, and the burner 53 is used to heat the metal workpiece inside the inner furnace 3 to complete the heating treatment of the metal workpiece. At the same time, after the heating step is completed, the heat generated by the burner 53 is controlled to complete the heat preservation treatment of the metal workpiece. When the metal workpiece needs to be cooled, the inner furnace 3 is driven to move upward, at which time the push frame 61 contacts the push plate 62 and pushes the push plate 62 to move toward the middle of the inner furnace 3. The push plate 62 pushes the metal workpiece to move, and the burner 53 and the metal workpiece gradually move to the opposite sides of the push plate 62. When the inner furnace 3 moves to the top, the burner 53 completely moves to one side of the push plate 62, and the cold air supply pipe 81 is adjusted to supply cold air. At this time, the cold air is blown toward the middle of the inner furnace 3, thereby completing the rapid cooling treatment of the metal workpiece. When cooling the metal workpiece through the cold air supply pipe 81 , the push plate 62 can isolate the heat generated by the burner 53 , thereby reducing the temperature impact of the burner 53 on the metal workpiece storage area, thereby improving the cooling efficiency of the metal workpiece.

[0065] As a preferred embodiment, the inner furnace 2 includes a bottom furnace box 21, an upper furnace box 22 and a furnace cover 23, wherein the upper furnace box 22 is arranged on the top of the bottom furnace box 21 and is connected to the bottom furnace box 21, and the furnace cover 23 covers the top of the upper furnace box 22, and the inner furnace 3 and the upper furnace box 22 are both square furnace boxes, the top end of the inner furnace 3 is embedded in the inner side of the upper furnace box 22, and the outer surface of the inner furnace 3 is sealed and fitted with the cavity wall of the upper furnace box 22.

[0066] In a specific implementation, the upper furnace box 22 protrudes from the furnace body 1 in the height direction to facilitate the opening and closing operation of the furnace cover 23. The size of the bottom furnace box 21 is larger than that of the upper furnace box 22, so that the bottom furnace box 21 can accommodate the inner furnace 3 and the combustion chamber 4 can be connected to the heating component 5 through the inner cavity of the bottom furnace box 21.

[0067] As a preferred embodiment, it includes a combustion chamber 4, and the heating component 5 also includes a connecting furnace pipe 51, wherein the combustion chamber 4 is arranged at the bottom of the bottom furnace box 21, and is used to burn natural gas to generate heat; the connecting furnace pipe 51 is connected to the combustion chamber 4 and the inner furnace pipe 52, the inner furnace pipe 52 is inclined and located inside the inner furnace 3, and a connecting hole 31 for the connecting furnace pipe 51 to pass through is opened on the inner furnace 3, and the push frame 61 protrudes the burner 53 in the extension direction of the burner 53.

[0068] In a specific implementation, the connecting furnace pipe 51 can move up and down along the connecting hole 31 , and the inner furnace pipe 52 initially forms an inclined frame, and is connected to the inner furnace pipe 52 through the pushing frame 61 , thereby realizing the inclined setting of the pushing frame 61 .

[0069] As a preferred embodiment, it also includes two matching parts 63, wherein the two matching parts 63 are both arranged at the top of the inner cavity of the inner assembly furnace 2 and are respectively located above the two push frames 61, the matching parts 63 include a sealing part 631 and an embedding part 632, the sealing part 631 is sealed and fitted with the cavity wall of the inner assembly furnace 2, and the embedding part 632 is arranged at the bottom of the sealing part 631, when the inner furnace 3 slides upward to the top, the embedding part 632 is inserted into the inner side of the inner furnace 3 and is sealed and fitted with the inner furnace 3, an embedding groove 6321 is provided at the bottom of the inner furnace 3, the push plate 62 is inserted into the inner side of the embedding groove 6321 and is sealed and fitted with the embedding groove 6321, and a vent hole 32 is provided at the bottom of the inner furnace 3.

[0070] In a specific implementation, when the inner furnace 3 is adjusted to move to the top, the push plate 62 can be moved to be inserted into the inside of the embedding groove 6321. Since the matching piece 63 includes a sealing portion 631 and an embedding portion 632, when the push plate 62 is inserted into the embedding groove 6321, the sealing portion 631 is sealed and connected to the inner furnace 2, and the embedding portion 632 is sealed and connected to the inner furnace 3, so that a cold air flow space can be formed between the matching piece 63, the push plate 62 and the inner furnace 3, so that the cold air can be fully blown to the top of the metal workpiece to cool the metal workpiece, and the cooled gas is blown out from the air vent 32 to form air flow, thereby increasing the utilization rate of the cold air and improving the cooling efficiency of the metal workpiece.

[0071] As a preferred embodiment, the traction component 7 also includes a sleeve 73, a sliding member 74 and a connecting rod 75, wherein the sleeve 73 is arranged inside the side box 71; the sliding member 74 is slidably arranged on the inner side of the sleeve 73; the connecting rod 75 is fixedly connected to the sliding member 74, and the end of the connecting rod 75 passes through and extends to the interior of the inner furnace 3, the connecting rod 75 is fixedly connected to the push plate 62, and the spring 72 is sleeved on the peripheral side of the connecting rod 75 and fixedly connected to the sliding member 74 and the sleeve 73.

[0072] In a specific implementation, a sealing structure is provided at the connection between the connecting rod 75 and the inner furnace 3, so that the connecting rod 75 can always be sealed and connected with the inner furnace 3 when moving. When the push plate 62 moves, the push plate 62 drives the connecting rod 75 to move, and the connecting rod 75 drives the sliding member 74 to move. The sliding member 74 squeezes the spring 72 and deforms the spring 72. With this design, when the inner furnace 3 is adjusted to slide downward to the original position, the spring 72 can restore the deformation and drive the push plate 62 to move to the reset position.

[0073] As a preferred embodiment, it also includes a driving gear 82, wherein the driving gear 82 is rotationally connected to the inner furnace 3, and a sliding tooth groove 221 is opened on the upper furnace box 22, and the driving gear 82 is located on the inner side of the sliding tooth groove 221 and meshes with the sliding tooth groove 221.

[0074] In a specific implementation, the driving gear 82 is rotatably arranged on one side of the upper furnace box 22. When it is necessary to adjust the inner furnace 3 to slide up and down, it is only necessary to adjust the rotation of the driving gear 82. At this time, the driving gear 82 can drive the inner furnace 3 to move up and down under the action of the sliding tooth groove 221 meshing with it, thereby completing the position adjustment of the inner furnace 3.

[0075] As a preferred embodiment, it also includes a first sealing plate 83 and a second sealing plate 84, wherein the opposite side walls of the inner cavity of the upper furnace box 22 are provided with receiving grooves 222, the first sealing plate 83 and the second sealing plate 84 are respectively rotatably arranged on the inner sides of the two receiving grooves 222, and are both sealed and fitted with the cavity wall of the upper furnace box 22, the first sealing plate 83 and the second sealing plate 84 are both located at the top of the inner furnace 3, and a supporting groove 831 for plugging the second sealing plate 84 is provided on the top of the first sealing plate 83, and the first sealing plate 83 and the second sealing plate 84 can both be rotated to the inner side of the receiving groove 222.

[0076] In a specific implementation, when the metal workpiece is heated by the burner 53, the first sealing plate 83 and the second sealing plate 84 are sealed and attached to each other and cover the top of the inner furnace 3 to isolate the inner furnace 3 from the cold air supply pipe 81, thereby preventing the high temperature generated by the burner 53 from damaging the cold air supply pipe 81 when the metal workpiece is heated by the burner 53, and preventing heat from escaping from the cold air supply pipe 81 to reduce the heating efficiency of the metal workpiece.

[0077] As a preferred embodiment, it also includes a furnace door 91, a supporting block 92 and a material introduction door 93, wherein a first furnace opening 11 is opened on one side of the furnace body 1, and a second furnace opening 211 is opened on one side of the inner furnace 2 corresponding to the first furnace opening 11, and the furnace door 91 is rotatably set on one side of the furnace body 1 to cover the first furnace opening 11; the supporting block 92 is set inside the first furnace opening 11 and the second furnace opening 211, and the top wall of the supporting block 92 is an inclined wall; the material introduction door 93 is rotatably set on one side of the inner furnace 3 to cover the inner furnace 3, and the bottom of the material introduction door 93 is rotatably connected to the inner furnace 3, and when the material introduction door 93 rotates, the supporting block 92 is supported on the bottom of the material introduction door 93, and the end of the material introduction door 93 protrudes from the first furnace opening 11.

[0078] In a specific implementation, when the metal workpiece needs to be supplied to the inner furnace 3 for heating treatment, the furnace door 91 and the material introduction door 93 are opened. At this time, the material introduction door 93 is supported on the top of the supporting block 92 in an inclined shape, and the end of the material introduction door 93 protrudes from the furnace body 1, so that the material introduction door 93 can better receive the metal workpiece. The metal workpiece can be directly discharged into the inner furnace 3 or discharged to the top of the material introduction door 93. When the metal workpiece is discharged to the top of the material introduction door 93, the metal workpiece can fall into the inner furnace 3 along the material introduction door 93, thereby completing the feeding process of the metal workpiece.

[0079] As a preferred embodiment, it also includes a lock 94 and a buckle plate 95, wherein the lock 94 is arranged between the material introduction door 93 and the inner furnace 3, and is used to locate the rotation position of the material introduction door 93; a buckle groove 931 is opened on the outer side of the material introduction door 93, and the buckle plate 95 is arranged inside the buckle groove 931, and a buckle seam is formed between the buckle plate 95 and the buckle groove 931.

[0080] In a specific implementation, when the material-introducing door 93 covers the inner furnace 3, the rotation position of the material-introducing door 93 can be positioned by the lock 94 to complete the closing process of the material-introducing door 93. By providing the buckle plate 95, when opening the material-introducing door 93, the hand can be inserted into the inner side of the buckle seam and force can be applied to the buckle plate 95 to conveniently open the material-introducing door 93.

[0081] The present invention also proposes a natural gas heat treatment method, comprising the natural gas heat treatment furnace described above, and further comprising the following steps:

[0082] Step 1: Open the furnace door 91 and the material introduction door 93, adjust the material introduction door 93 to rotate to be supported on the top of the supporting block 92, and supply the metal workpiece to the top of the material introduction door 93, so that the metal workpiece falls into the inner furnace 3 along the material introduction door 93, thereby completing the loading process of the metal workpiece. At the same time, after opening the furnace door 91 and the material introduction door 93, the metal workpiece can be directly discharged into the inner furnace 3 for loading;

[0083] Step 2: close the furnace door 91 and the material introduction door 93, and heat the metal workpiece in the inner furnace 3 through the burner 53 to complete the heating treatment of the metal workpiece;

[0084] Step 3: Controlling the temperature of the burner 53 to complete the heat preservation treatment of the metal workpiece;

[0085] Step 4: Drive the inner furnace 3 to move upward along the inner assembly furnace 2. At this time, the push frame 61 contacts the push plate 62 and pushes the push plate 62 to slide toward the middle of the inner furnace 3. The push plate 62 pushes the metal workpiece in the inner furnace 3 to slide toward the middle of the inner furnace 3. When the inner furnace 3 moves to the top, cold air is supplied to the inner furnace 3 through the cold air supply pipe 81, thereby completing the rapid cooling of the metal workpiece.

[0086] Step 5: Drive the inner furnace 3 to move downward along the inner assembly furnace 2 to its original position, open the furnace door 91 and the material introduction door 93, and take out the heat-treated metal workpiece from the inner furnace 3 to complete the material removal process of the metal workpiece.

[0087] The working principle of the present invention is introduced below:

[0088] The furnace door 91 and the material introduction door 93 are opened to supply the metal workpiece to the interior of the inner furnace 3 to complete the loading process of the metal workpiece. After the loading process is completed, the furnace door 91 and the material introduction door 93 are closed and the combustion chamber 4 is started. The heat generated by the combustion of natural gas in the combustion chamber 4 is ejected from the burner 53 through the connecting furnace pipe 51 and the inner furnace pipe 52, thereby completing the heating process of the metal workpiece. At the same time, after the heating step is completed, the heat generated by the burner 53 is controlled to complete the heat preservation process of the metal workpiece. When the metal workpiece needs to be cooled, the driving gear 82 is adjusted to rotate. At this time, the driving gear 82 drives the inner furnace 3 to move upward, the push frame 61 contacts the push plate 62, and pushes the push plate 62 to move toward the middle of the inner furnace 3. The push plate 62 pushes the metal workpiece to move, and the burner 53 and the metal workpiece gradually move to the opposite sides of the push plate 62. When the inner furnace 3 moves to the top, the burner 53 moves completely to one side of the push plate 62, and the push plate 62 is inserted into the inside of the embedding groove 6321. The cold air supply pipe 81 is adjusted to supply cold air. At this time, the cold air is blown toward the middle of the inner furnace 3, thereby completing the rapid cooling of the metal workpiece.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A natural gas heat treatment furnace, characterized in that: The invention comprises a furnace body (1), an inner assembly furnace (2), an inner furnace (3), a heating component (5), two push racks (61), two push plates (62), two traction components (7), a cold air supply pipe (81), a combustion chamber (4), and two matching parts (63); the heating component (5) further comprises a connecting furnace pipe (51), a first sealing plate (83) and a second sealing plate (84); the inner assembly furnace (2) comprises a bottom furnace box (21), an upper furnace box (22) and a furnace cover (23); wherein: The inner assembly furnace (2) is arranged inside the furnace body (1), and the inner furnace (3) is slidably arranged inside the inner assembly furnace (2), and the inner furnace (3) is used to store metal workpieces; The heating component (5) comprises two inner furnace tubes (52) and a plurality of burners (53), the two inner furnace tubes (52) are respectively located at opposite sides of the inner cavity of the inner furnace (3) and are fixedly arranged relative to the inner assembly furnace (2), the plurality of burners (53) are respectively connected to the two inner furnace tubes (52), and the burners (53) are used to heat the metal workpiece; The push frame (61) is an inclined frame, and the two push frames (61) are respectively located on opposite sides of the inner cavity of the inner furnace (3), and are respectively fixedly connected to the two inner furnace tubes (52); Two push plates (62) are both slidably arranged on the inner side of the inner furnace (3), the push plates (62) are sealed and fitted with the cavity wall of the inner furnace (3), the two push plates (62) are relative to the two push racks (61) in the height direction, and the metal workpiece is stored between the two push plates (62). When the inner furnace (3) slides upward, the push rack (61) contacts the push plate (62) and pushes the push plate (62) to slide in the direction close to the middle of the inner furnace (3). When the inner furnace (3) slides to the top, the burner (53) and the metal workpiece are respectively located on opposite sides of the push plate (62); The traction component (7) comprises a side box (71) and a spring (72), the two side boxes (71) are respectively arranged on opposite sides of the inner furnace (3), and the spring (72) is arranged between the side box (71) and the push plate (62) and is used to reset the sliding position of the push plate (62); The top of the inner furnace (3) is open, and the cold air supply pipe (81) is connected to the top of the inner assembly furnace (2) and is used to supply cold air to the middle of the inner cavity of the inner furnace (3); An upper furnace box (22) is arranged on the top of the bottom furnace box (21) and is connected to the bottom furnace box (21); the furnace cover (23) covers the top of the upper furnace box (22); the inner furnace (3) and the upper furnace box (22) are both square furnace boxes; the top of the inner furnace (3) is embedded in the inner side of the upper furnace box (22); and the outer surface of the inner furnace (3) is sealed and fitted with the cavity wall of the upper furnace box (22); The combustion chamber (4) is arranged at the bottom of the bottom furnace box (21) and is used to burn natural gas to generate heat; The connecting furnace pipe (51) is connected to the combustion chamber (4) and the inner furnace pipe (52); the inner furnace pipe (52) is inclined and located inside the inner furnace (3); and a connecting hole (31) for the connecting furnace pipe (51) to pass through is provided on the inner furnace (3); and the pushing frame (61) protrudes from the burner (53) in the extension direction of the burner (53); Two matching pieces (63) are both arranged at the top of the inner cavity of the inner furnace (2) and are respectively located above the two push frames (61). The matching piece (63) includes a sealing portion (631) and an embedding portion (632). The sealing portion (631) is sealed and fitted with the cavity wall of the inner furnace (2), and the embedding portion (632) is arranged at the bottom of the sealing portion (631). When the inner furnace (3) slides upward to the top, the embedding portion (632) is inserted into the inner side of the inner furnace (3) and is sealed and fitted with the inner furnace (3). An embedding groove (6321) is provided at the bottom of the inner furnace (3). The push plate (62) is inserted into the inner side of the embedding groove (6321) and is sealed and fitted with the embedding groove (6321). A vent hole (32) is provided at the bottom of the inner furnace (3); Receiving grooves (222) are provided on opposite side walls of the inner cavity of the upper furnace box (22); the first sealing plate (83) and the second sealing plate (84) are respectively rotatably arranged on the inner sides of the two receiving grooves (222) and are both sealed and fitted with the cavity wall of the upper furnace box (22); the first sealing plate (83) and the second sealing plate (84) are both located at the top of the inner furnace (3); a supporting groove (831) for plugging the second sealing plate (84) is provided on the top of the first sealing plate (83); and the first sealing plate (83) and the second sealing plate (84) can both be rotatably arranged to be located on the inner sides of the receiving grooves (222); The upper furnace box (22) protrudes from the furnace body (1) in the height direction, and the size of the bottom furnace box (21) is larger than that of the upper furnace box (22).

2. The natural gas heat treatment furnace according to claim 1, characterized in that: The traction component (7) further comprises a sleeve (73), a sliding member (74) and a connecting rod (75), wherein: A sleeve (73) is arranged inside the side box (71); A sliding member (74) is slidably disposed on the inner side of the sleeve (73); The connecting rod (75) is fixedly connected to the sliding member (74), and the end of the connecting rod (75) passes through and extends to the interior of the inner furnace (3). The connecting rod (75) is fixedly connected to the push plate (62), and the spring (72) is sleeved on the peripheral side of the connecting rod (75) and fixedly connected to the sliding member (74) and the sleeve (73).

3. The natural gas heat treatment furnace according to claim 1, characterized in that: Also included is a drive gear (82), wherein: The driving gear (82) is rotationally connected to the inner furnace (3), and a sliding tooth groove (221) is provided on the upper furnace box (22). The driving gear (82) is located on the inner side of the sliding tooth groove (221) and meshes with the sliding tooth groove (221).

4. The natural gas heat treatment furnace according to claim 1, characterized in that: It also includes a furnace door (91), a supporting block (92) and a material introduction door (93), wherein: A first furnace opening (11) is provided on one side of the furnace body (1), and a second furnace opening (211) is provided on a side of the internal assembly furnace (2) corresponding to the first furnace opening (11); the furnace door (91) is rotatably arranged on one side of the furnace body (1) to cover the first furnace opening (11); A supporting block (92) is arranged inside the first furnace opening (11) and the second furnace opening (211), and the top wall of the supporting block (92) is an inclined wall; A material introduction door (93) is rotatably arranged on one side of the inner furnace (3) to cover the inner furnace (3). The bottom of the material introduction door (93) is rotatably connected to the inner furnace (3). When the material introduction door (93) rotates, the supporting block (92) is supported on the bottom of the material introduction door (93), and the end of the material introduction door (93) protrudes from the first furnace opening (11).

5. The natural gas heat treatment furnace according to claim 4, characterized in that: It also includes a lock buckle (94) and a buckle plate (95), wherein: A lock (94), arranged between the material introduction door (93) and the inner furnace (3), and used for positioning the rotation position of the material introduction door (93); A buckle groove (931) is provided on the outer side of the material introduction door (93), and the buckle plate (95) is arranged inside the buckle groove (931), and a buckle seam is formed between the buckle plate (95) and the buckle groove (931).

6. A natural gas heat treatment method, characterized in that: The natural gas heat treatment furnace according to claim 4 further comprises the following steps: S1, opening the furnace door (91) and the material introduction door (93), adjusting the material introduction door (93) to rotate to be supported on the top of the supporting block (92), and supplying the metal workpiece to the top of the material introduction door (93), so that the metal workpiece falls into the inner furnace (3) along the material introduction door (93), thereby completing the loading process of the metal workpiece; S2, closing the furnace door (91) and the material introduction door (93), and heating the metal workpiece in the inner furnace (3) through the burner (53) to complete the heating treatment of the metal workpiece; S3, controlling the temperature of the burner (53) to complete the heat preservation treatment of the metal workpiece; S4, driving the inner furnace (3) to move upward along the inner assembly furnace (2), at which time the push frame (61) contacts the push plate (62) and pushes the push plate (62) to slide toward the middle of the inner furnace (3), and the push plate (62) pushes the metal workpiece in the inner furnace (3) to slide toward the middle of the inner furnace (3). When the inner furnace (3) moves to the top, cold air is supplied to the inner furnace (3) through the cold air supply pipe (81), thereby completing the rapid cooling process of the metal workpiece.

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